Controltag.js Adware Windows 10

I am running Norton Security on a Windows 10 PC.  Recently I started getting a popup asking if I want to allow Controltag.js.  I said no and went to my downloads folder and there were several of them -- which I then deleted.  I rebooted and ran a Norton Quick Scan, but did not find anything and indicated no security threats were removed.  However, each time I open up Microsoft Edge and go to CNN.com, it get this popup again. 

Is there a reason why Norton is finding it or removing it?  And is there a way for me to remove it myself?  Thank you.